'Strap' in the Bible

He proclaimed, "One more powerful than I am is coming after me; I am not worthy to bend down and untie the strap of his sandals.

John answered them all, "I baptize you with water, but one more powerful than I am is coming -- I am not worthy to untie the strap of his sandals. He will baptize you with the Holy Spirit and fire.

who is coming after me. I am not worthy to untie the strap of his sandal!"